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NSK needle roller bearings use rollers with small diameter relative to length in mechanisms constrained by radial space. Different constructions coexist, so “needle bearing” alone does not establish included raceways or the shaft interface. The catalog separately groups needle cages and components, and inner rings. A dismantled item may therefore represent only part of the complete arrangement.
See all NSK bearings references →NSK guide →Needle roller bearings from all brands →NSK tapered roller bearings →NSK Y-bearings (inserts) →
Examples are RLM158, RNA49/14 and NA49/22. The first joins letters and numbers without separators; the others include a slash within the numeric portion. RNA and NA remain distinct groups: removing or adding a letter changes identification. Do not transfer an RLM reading rule to NA or RNA, or infer undocumented dimensions. Compare the full reference with the product record and the original raceway components.
In a compact gearbox, this bearing can sit inside a gear or a housing surrounding the shaft. Identify the inner raceway surface, bearing retention and lubrication route. Where the shaft acts as a raceway, its surface condition belongs to replacement assessment; a new bearing does not automatically repair a damaged seat. Record axial space and neighboring parts because axial guidance and loads may be handled elsewhere.
Send MR Accesorios Industriales the full marking, quantity and photographs of the removed item with its rings or spacers. Include shaft diameter, housing diameter and measured width, naming the surface measured. Explain the mechanism and whether a separate inner ring is required. This distinguishes equal dimensions from an identical arrangement and prevents an isolated cage being treated as a complete bearing.
Not necessarily; cages belong to a separate component line.
Check whether it acts as a raceway and assess its surface.
No; retain the complete original group.
Can't find the exact model? Write to us with the part number or model you're looking for: we'll find it and quote it, even if it's not listed in the catalog.
The NSK RLM series needle roller bearing is a cylindrical roller bearing of small diameter, designed to support high radial loads in very small radial spaces. It is used in applications where the design requires a low profile and high load capacity, such as machine tools, transmissions, pumps and automation equipment. MR Accesorios Industriales sells this series in Buenos Aires, Argentina, and advises you to select the right size for your application.
The NSK LM series needle roller bearing is a radial needle roller bearing with inner and outer rings, designed to withstand high radial loads in very compact spaces. It is used in applications where the available radial section is limited and high rigidity is required, such as machine tools, transmission equipment and precision mechanisms. MR Accesorios Industriales sells this series in Buenos Aires, Argentina, and advises you on choosing the correct designation for your application.
The NSK RNA series needle roller bearing is a radial bearing without an inner ring, designed to withstand high loads in very small radial spaces. It mounts directly on a hardened and ground shaft, which simplifies the assembly and reduces weight. It is a common solution in transmissions, pumps, compressors and continuous production machinery, where robustness and dimensional precision are critical to avoid unplanned downtime.
Just the manufacturer part number is enough: we will quote it and provide dimensions and equivalents via WhatsApp or email.
